US4865893A - Longitudinally divided sleeve tube for cable sleeves - Google Patents

Longitudinally divided sleeve tube for cable sleeves Download PDF

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Publication number
US4865893A
US4865893A US07/130,619 US13061987A US4865893A US 4865893 A US4865893 A US 4865893A US 13061987 A US13061987 A US 13061987A US 4865893 A US4865893 A US 4865893A
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US
United States
Prior art keywords
sleeve tube
curvature
radius
opening
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/130,619
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English (en)
Inventor
Dieter Kunze
Ernst Bachel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT, BERLIN AND MUNICH, GERMANY A CORP. OF GERMANY reassignment SIEMENS AKTIENGESELLSCHAFT, BERLIN AND MUNICH, GERMANY A CORP. OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BACHEL, ERNST, KUNZE, DIETER
Application granted granted Critical
Publication of US4865893A publication Critical patent/US4865893A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24744—Longitudinal or transverse tubular cavity or cell

Definitions

  • the present invention is directed to a longitudinally divided, spreadable sleeve tube which coacts with sealing elements at each end to form a cable sleeve.
  • the sleeve tube has a longitudinally extending slit or opening having closing elements in the form of a projection, which run along the longitudinal edges of the opening which projection receives a sealing system which is disposed between mating faces of the projections as the projections are clamped together.
  • the object of the present invention is to provide a sleeve tube with a single slit made of a thermoplastic synthetic material in which its basic shape in the spread state is such so that it rests on the end sealing elements with the same sealing condition all around and improves the sealing condition in the longitudinal seal when in the closed state.
  • a longitudinally divided sleeve tube which coacts with end sealing elements to form a cable sleeve, said sleeve tube having a longitudinally extending slot or opening with longitudinally extending projections extending along the slot to form mating faces for forming a sealing system.
  • the improvements are that, while in the spread condition, the opening angle between the longitudinal edges of the opening or slot is such that the mating faces of the two projections will come together face-to-face with uniform contact pressure when moved to a closed state.
  • a first advantage of the sleeve tube in accordance with the inventions is that the peripheral seal between the fitted sleeve tube and each end sealing element is loaded evenly so that the sealing conditions are the same over the entire peripheral area.
  • a second advantage is the shape of the sleeve tube in a spread condition is such that the mating faces along the longitudinal edges come together in a flat contact when it is fitted onto the sealing element so that the required closing forces are much less than with systems presently known because the force needed to tilt the sealing or mating faces has been eliminated.
  • the cross section of the sleeve tube is so shaped that the sealing faces line up with one another when the sleeve tube is closed so that a clearly defined condition prevails when mutual contact occurs.
  • FIG. 1 is a perspective view of a closed cable sleeve comprising the sleeve tube of the present invention, end sealing elements and wedge-shaped closures;
  • FIG. 2 is an end view of a sleeve tube in a spread condition having a circular configuration in accordance with known sleeve tubes;
  • FIG. 3 is the sleeve tube of FIG. 2 when initially moved to a closed position
  • FIG. 4 is an end view of a sleeve tube in accordance with the present invention while in an open condition and which departs from a circular shape;
  • FIG. 5 is the sleeve tube of FIG. 4 when in a closed position and having a circular shape
  • FIG. 6 is a graph illustrating half of the sleeve tube of the present invention with respect to the diameters in various positions.
  • the principles of the present invention are particularly useful when incorporated in a sleeve tube M with a single, longitudinal division, slot or opening.
  • the sleeve tube cooperates with end sealing elements DK to form a cable sleeve.
  • a sealing insert D is interposed between the peripheral surface of the sealing elements DK and the sleeve tube M to form a seal when the pressure is applied to the sleeve tube.
  • the sleeve tube M adjacent the longitudinally extending slot has two projections W which have undercuts and a wedge shape.
  • a sealing insert is also located in the longitudinal dividing line in a sealing groove, such as DN (FIG. 2), between the two projections W.
  • a corresponding closure pressure is produced by two matched closing rails VS (FIG. 1) which engage the wedge-shaped projections W to hold the faces in tight sealing engagement.
  • the internal circumference of the sleeve tube M and the external circumference of the sealing element DK at each end are so matched that the required closing pressure is produced in the peripheral sealing system by the fitting of the closing rails VS.
  • uniform pressure distributions in the peripheral sealing system is not attainable. However, in the present invention, they are.
  • a prior known sleeve tube MK was made on a cylindrical mold element having a radius R by an injection molding process. Since the sleeve tube has to be opened a certain amount for removal from the mold core during manufacturing and for fitting on elements to be sheathed in order to avoid unnecessarily overstretching it, the longitudinal edges with the longitudinal projections W stand apart from one another on an arc of a circle having the radius R which continues the circular shape of the sleeve tube MK.
  • the mating surfaces or faces SF of the two projections W extend perpendicular to the tangent of the sleeve tube MK in a spread condition.
  • a gap i.e., the opening of the sleeve tube MK must be maintained in every case as the two mating faces SF must be profiled according to the longitudinal sealing system with the sealing groove, such as DN, and a sealing tongue, such as DF.
  • the sealing tube MK itself must always exhibit sufficient elasticity to expand further and close later without being damaged.
  • a thermoplastic synthetic material is chosen for the tube. For example, a polyolefin which exhibits the appropriate mechanical properties.
  • the prior art sleeve tube MK of FIG. 2 has been moved to a closed position, such as illustrated in FIG. 1.
  • the two longitudinal edges with the projections W are drawn together, they produce, a tube with a roughly oval shape, and when the longitudinal edges meet, a point is initially formed at the dividing location.
  • the wedge-shaped areas along the dividing line, when the closing pressure is initially very small, is particularly critical.
  • the two meeting faces SF can only be brought together face-to-face by applying considerable force on the projections W, which inevitably produce a drop in pressure from the inside to the outside. It is these very difficulties mentioned here that the sleeve tube in accordance with the present invention is designed to eliminate, as will be explained hereinafter.
  • a sleeve tube MF in accordance with the present invention is illustrated in FIG. 4 and is manufactured on a mold core which no longer has a circular cross section.
  • This mold core and the sleeve tube MF manufactured on it have a form which departs from the circular shape, particularly towards the two longitudinal edges, and these two longitudinal edges are additionally curved inwards.
  • This additional curvature is uniform along the length of the sleeve tube and increases continually. This produces what roughly approximates an egg-shaped cross section, and the additional curvature producing an angular movement of the egg shape.
  • the sleeve tube cross section is only symmetrical to the center line which runs through the center of the sleeve opening and through an apex S, which is neutral during deformation and lies opposite the opening.
  • this additional curvature does not just take place at the end edges, but increases uniformly over the entire curvature of the sleeve when the longitudinal edges are brought together, every section of the sleeve tube viewed in part is just moved inward according to the position of the longitudinal edges at the time.
  • every point of the sleeve tube is moved inward evenly until the sleeve tube MF finally bears uniformly on the internal end sealing elements DK.
  • the diameter of the sleeve tube MF and the sealing elements DK can be selected appropriately so that the closing operation, with the aid of the closing rails, produces a required closing pressure in the peripheral sealing system as well.
  • FIG. 5 shows the final state of the fitted sleeve tube MF of the present invention with the mating faces being automatically brought together face-to-face and having a uniform contact on a circular sealing element DK. This is produced by the choice of the dimension for the curved shape.
  • the closure rail VS is fitted over the two undercut projections W forming a frictional connection and provide a necessary closing force.
  • the closing elements can be made correspondingly lighter by virtue of the reduced force that is required. In some circumstances, this means that the metal rails previously required can now be replaced with plastic rails which present advantages with regard to corrosion resistance in addition to being easier to manufacture.
  • a half sleeve tube in a spread condition is indicated at MO in FIG. 6.
  • the half-sleeve or tube MO has a different curvature than a curvature of a cylindrical shape K, which has a center point MFA and a first radius, with the difference in curvature being an increase in curvature ZK.
  • One half of an aperture angle 1/2OW is also indicated in the drawing.
  • this one half of the aperture angle of half the sleeve tube is relative to the central axis of the sleeve tube.
  • the aperture angle should be sufficiently large so that the manufactured sleeve tube can be pulled off the injection mold core after injection molding without any permanent deformation occuring. Also, the aperture angle should be such that it can be fitted over the elements to be sheathed with only slight expansion.
  • the one half of the aperture angle 1/2OW, which extends through the neutral vertex S should be in a range of 30°-50°, which means that the complete aperture angle OW will be in a range of 60°-100°.
  • the result is a matched circular shape MZ, which has a second radius and has exactly the diameter corresponding to the sealing elements DK which are to be used.
  • the final or second radius is determined during the injection molding of the sleeve tube so that the seamless smooth transition is obtained from one longitudinal edge to the other.
  • the graph also shows that the diameter of the fitted sleeve MZ is smaller than that of the imaginary circle K, which approximately coincides with the initial shape of the curvature of the sleeve MF produced with the additional curvature in the spread form or opened condition.
  • the deflection f which, for our purposes, is the curvature ZK of a bar in the direction of a load P, is equal to the partial derivative of the deformation energy A with respect to the load P.
  • the load P should be equated with the force with which the longitudinal edges are pressed inward.
  • the sleeve tube MF when in a closed condition (FIG. 5) with the projections W in contact with each other and on a peripheral surface of an end sealing member DK of FIG. 1, will have a first radius R of curvature which is the same as the radius of curvature of the peripheral surface of the end sealing members DK.
  • the sleeve member in the open molded position, as illustrated in FIGS. 4 and 6, has a changing radius of curvature, with the largest radius being a second radius at apex S or a point S opposite to the longitudinal opening and the second radius is larger than the first radius R.
  • the radius of curvature decreases as the peripheral distance from point S increases.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US07/130,619 1986-12-18 1987-12-09 Longitudinally divided sleeve tube for cable sleeves Expired - Lifetime US4865893A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3643370A DE3643370C3 (de) 1986-12-18 1986-12-18 Längsgeteiltes Muffenrohr für Kabelmuffen
DE3643370 1986-12-18

Publications (1)

Publication Number Publication Date
US4865893A true US4865893A (en) 1989-09-12

Family

ID=6316546

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/130,619 Expired - Lifetime US4865893A (en) 1986-12-18 1987-12-09 Longitudinally divided sleeve tube for cable sleeves

Country Status (5)

Country Link
US (1) US4865893A (de)
JP (1) JP2541590B2 (de)
AU (1) AU589054B2 (de)
CA (1) CA1285232C (de)
DE (1) DE3643370C3 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018982A1 (en) * 1992-03-19 1993-09-30 Proprietary Technology, Inc. Means for protecting conducting equipment
US5426715A (en) * 1993-07-23 1995-06-20 Raychem Corporation Oval port seal and method used for an optical fiber cable closure
US5446823A (en) * 1994-01-26 1995-08-29 Raychem Corporation Aerial, pedestal, below grade, or buried optical fiber closure
US5505230A (en) * 1992-03-19 1996-04-09 Proprietary Technology, Inc. Means for protecting conducting equipment
US5905231A (en) * 1995-06-21 1999-05-18 A. Raymond & Cie Tubular sheathing channel to encase bunched cables
US6002083A (en) * 1997-11-14 1999-12-14 Emerson Electric Co. Terminal box for electric motor
WO2001013485A1 (de) * 1999-08-13 2001-02-22 Rxs Gesellschaft Für Vermögensverwaltung Mbh Universale kabelgarnitur
US6218620B1 (en) * 1999-05-19 2001-04-17 John M. Michel Housing for telephone splices and the like and method
US6227251B1 (en) * 2000-02-29 2001-05-08 Composites Industrial Service Co., Ltd Wire protecting structure
US6283670B1 (en) * 1999-01-27 2001-09-04 3M Innovative Properties Company Splice case having a seam sealed by at least one clamping rail
US20040261880A1 (en) * 2003-06-26 2004-12-30 Concord Colony Farms Ltd. Tubing system and method of assembly
US20060207827A1 (en) * 2005-03-15 2006-09-21 Honeywell International, Inc. Support means for an acoustic liner used in an auxiliary power unit exhaust muffler
US20100143042A1 (en) * 2007-01-17 2010-06-10 Condat Sa/Saipem Device for Restoring or for Installing the Thermally Insulating External Jacket of Pipes, Tubes, Hoses, Connection Elements and Other Jacketed Elements
US20100194105A1 (en) * 2009-02-04 2010-08-05 9074-1133 Quebec Inc. Ventilation duct assembly kit and method of assembly using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137206A1 (de) * 1991-11-12 1993-05-13 Stewing Kunststoff Kabelmuffe zum verbinden und abzweigen von kabeln, insbesondere fernmeldekabeln
DE29517380U1 (de) * 1995-11-02 1996-01-04 Armstrong World Industries GmbH, 48153 Münster Isolierschlauch und Vorrichtung zu seiner Herstellung
DE102009012699A1 (de) 2009-03-11 2010-09-16 Wurzer Profiliertechnik Gmbh Rohr mit integraler Rohrmuffe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7423507U (de) * 1974-07-10 1974-11-14 Siemens Ag Kabelmuffe
US4364419A (en) * 1980-03-14 1982-12-21 Raychem Corporation Heat-recoverable wraparound closure
US4388488A (en) * 1979-09-27 1983-06-14 Siemens Aktiengesellschaft Sealing system for a longitudinally divided cable fitting element
US4626458A (en) * 1983-01-06 1986-12-02 Raychem Limited Recoverable article for encapsulation
US4675512A (en) * 1983-03-01 1987-06-23 Nv Raychem Sa Electrically heat-recoverable article

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009078C2 (de) * 1980-03-10 1983-01-20 Siemens AG, 1000 Berlin und 8000 München Längsgeteilte Kabelmuffe aus schrumpfbarem Material
DE3038922C2 (de) * 1980-10-15 1987-08-20 kabelmetal electro GmbH, 3000 Hannover Schlauchförmige Garnitur für elektrische Kabel und Rohrleitungen und Verfahren zu ihrer Herstellung
FR2499030A2 (fr) * 1981-01-30 1982-08-06 Flimon Jacques Dispositif protecteur pour tubes de forage, notamment petroliers
JPS5840695U (ja) * 1981-09-12 1983-03-17 橋本フオ−ミング工業株式会社 流体搬送管の包囲材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7423507U (de) * 1974-07-10 1974-11-14 Siemens Ag Kabelmuffe
US4388488A (en) * 1979-09-27 1983-06-14 Siemens Aktiengesellschaft Sealing system for a longitudinally divided cable fitting element
US4364419A (en) * 1980-03-14 1982-12-21 Raychem Corporation Heat-recoverable wraparound closure
US4626458A (en) * 1983-01-06 1986-12-02 Raychem Limited Recoverable article for encapsulation
US4675512A (en) * 1983-03-01 1987-06-23 Nv Raychem Sa Electrically heat-recoverable article

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505230A (en) * 1992-03-19 1996-04-09 Proprietary Technology, Inc. Means for protecting conducting equipment
WO1993018982A1 (en) * 1992-03-19 1993-09-30 Proprietary Technology, Inc. Means for protecting conducting equipment
US5426715A (en) * 1993-07-23 1995-06-20 Raychem Corporation Oval port seal and method used for an optical fiber cable closure
US5446823A (en) * 1994-01-26 1995-08-29 Raychem Corporation Aerial, pedestal, below grade, or buried optical fiber closure
US5556060A (en) * 1994-01-26 1996-09-17 Raychem Corporation Aerial pedestal below grade or buried optical fiber
US6274813B1 (en) 1995-06-21 2001-08-14 A. Raymond & Cie Tubular sheathing channel to encase bunched cables
US5905231A (en) * 1995-06-21 1999-05-18 A. Raymond & Cie Tubular sheathing channel to encase bunched cables
US6002083A (en) * 1997-11-14 1999-12-14 Emerson Electric Co. Terminal box for electric motor
US6283670B1 (en) * 1999-01-27 2001-09-04 3M Innovative Properties Company Splice case having a seam sealed by at least one clamping rail
US6218620B1 (en) * 1999-05-19 2001-04-17 John M. Michel Housing for telephone splices and the like and method
WO2001013485A1 (de) * 1999-08-13 2001-02-22 Rxs Gesellschaft Für Vermögensverwaltung Mbh Universale kabelgarnitur
US6227251B1 (en) * 2000-02-29 2001-05-08 Composites Industrial Service Co., Ltd Wire protecting structure
US20040261880A1 (en) * 2003-06-26 2004-12-30 Concord Colony Farms Ltd. Tubing system and method of assembly
US20060207827A1 (en) * 2005-03-15 2006-09-21 Honeywell International, Inc. Support means for an acoustic liner used in an auxiliary power unit exhaust muffler
US7431126B2 (en) 2005-03-15 2008-10-07 Honeywell International Inc. Support means for an acoustic liner used in an auxiliary power unit exhaust muffler
US20100143042A1 (en) * 2007-01-17 2010-06-10 Condat Sa/Saipem Device for Restoring or for Installing the Thermally Insulating External Jacket of Pipes, Tubes, Hoses, Connection Elements and Other Jacketed Elements
US20100194105A1 (en) * 2009-02-04 2010-08-05 9074-1133 Quebec Inc. Ventilation duct assembly kit and method of assembly using the same
US8336925B2 (en) * 2009-02-04 2012-12-25 Mecanincad Inc. Ventilation duct assembly kit and method of assembly using the same

Also Published As

Publication number Publication date
CA1285232C (en) 1991-06-25
AU8265787A (en) 1988-06-23
DE3643370C3 (de) 1996-08-14
DE3643370A1 (de) 1988-06-23
JPS63167194A (ja) 1988-07-11
JP2541590B2 (ja) 1996-10-09
DE3643370C2 (de) 1991-07-18
AU589054B2 (en) 1989-09-28

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Owner name: SIEMENS AKTIENGESELLSCHAFT, BERLIN AND MUNICH, GER

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